import constants
from flask import current_app, jsonify
from flask import render_template
from flask import request
from flask import session
from info import redis_store
from info.models import User, News, Category
from utils.response_code import RET

from . import index_blu


@index_blu.route('/news_list')
def news_list():
    """
    获取首页新闻数据
    :return:
    """
    # 1. 获取参数
    # 获取新闻的分类id
    cid = request.args.get("cid", "1")
    page = request.args.get("page", "1")
    per_page = request.args.get("per_page", "10")

    # 2.校验参数
    try:
        page = int(page)
        cid = int(cid)
        per_page = int(per_page)
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.PARAMERR, errmsg="参数错误")

    filters = []
    if cid != 1:
        # 查询是不是最新的数据
        # 需要添加条件
        filters.append(News.category_id == cid)

    # 3.查询数据
    try:
        paginate = News.query.filter(*filters).order_by(News.create_time.desc()).paginate(page, per_page, False)
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.DBERR, errmsg="数据库查询错误")

    # 取到当前的数据
    news_model_list = paginate.items  # 模型对象列表
    total_page = paginate.pages
    current_page = paginate.page

    # 将模型对象列表转成字典列表
    news_dict_li = []
    for news in news_model_list:
        news_dict_li.append(news.to_basic_dict())

    data = {
        "total_page": total_page,
        "current_page": current_page,
        "news_dict_li": news_dict_li
    }

    return jsonify(errno=RET.OK, errmsg="OK", data=data)


@index_blu.route('/')
def index():
    # 向redis中保存一个值 name jiaojunjie
    # redis_store .set('name ', 'jiaojunjie')
    # session["name"] = "jiaojunjie"
    # 显示用户是否登录的逻辑
    user_id = session.get("user_id", None)
    user = None
    if user_id:
        try:
            user = User.query.get(user_id)
        except Exception as e:
            current_app.logger.error(e)
    # 右侧新闻排行的逻辑
    news_list = []
    try:
        news_list = News.query.order_by(News.clicks.desc()).limit(constants.CLICK_RANK_MAX_NEWS)
    except Exception as e:
        current_app.logger.error(e)

    # 定义一个空的字典列表,里面是字典
    news_dict_li = []
    for news in news_list:
        news_dict_li.append(news.to_dict())

    # 查询分类数据, 通过模板的形式渲染
    categories = Category.query.all()
    category_li = []
    for category in categories:
        category_li.append(category.to_dict())

    data = {
        "user": user.to_dict() if user else None,
        "news_dict_li": news_dict_li,
        "category_li": category_li
    }
    return render_template('news/index.html', data=data)


# 在打开网页的时候,浏览器会默认去请求根路径+favicon.ico作为网站标签的小图标
# send_static_file 是 flask 去查找指定的静态文件所调用的方法
@index_blu.route('/favicon.ico')
def favicon():
    return current_app.send_static_file('news/favicon.ico')
